Table 2 Steps required in performing the sign test
Step | Details |
|---|---|
1 | State the null hypothesis and, in particular, the hypothesized value for comparison |
2 | Allocate a sign (+ or -) to each observation according to whether it is greater or less than the hypothesized value. (Observations exactly equal to the hypothesized value are dropped from the analysis) |
3 | Determine: |
| Â | N+ = the number of observations greater than the hypothesized value |
| Â | N- = the number of observations less than the hypothesized value |
| Â | S = the smaller of N+ and N- |
4 | Calculate an appropriate P value |